[PATCH RESEND] sched/deadline: fix pull if dl task who's prio changed is not on queue

[Wanpeng Li <wanpeng.li@linux.intel.com>]

Dl task who is not on queue and it is also the curr task simultaneously
can not happen. In addition, pull since the priority of a not on queue
dl task doesn't make any sense.

This patch fix it by don't pull if dl task who's prio changed is not on
queue.

Signed-off-by: Wanpeng Li <wanpeng.li@linux.intel.com>
---
 kernel/sched/deadline.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/kernel/sched/deadline.c b/kernel/sched/deadline.c
index 49f92c8..ca391c0 100644
--- a/kernel/sched/deadline.c
+++ b/kernel/sched/deadline.c
@@ -1728,7 +1728,10 @@ static void switched_to_dl(struct rq *rq, struct task_struct *p)
 static void prio_changed_dl(struct rq *rq, struct task_struct *p,
 			    int oldprio)
 {
-	if (task_on_rq_queued(p) || rq->curr == p) {
+	if (!task_on_rq_queued(p))
+		return;
+
+	if (rq->curr == p) {
 #ifdef CONFIG_SMP
 		/*
 		 * This might be too much, but unfortunately
-- 
1.9.1